Clear gutters and downpipes

Blocked gutters are one of the most common causes of winter water damage. Leaves, moss, and debris accumulate during autumn, preventing water from draining away. When temperatures drop, this trapped water can freeze, leading to cracks, overflow and damp patches appearing on internal walls or ceilings. 

For both commercial and residential properties, ensure gutters, hoppers and downpipes are thoroughly cleaned before winter sets in. Regular checks throughout the season are also recommended, especially after storms.

Treat cut edge corrosion before it spreads

For metal roofing systems commonly used on commercial buildings, cut edge corrosion is a major risk. This occurs where factory-coated steel sheets are trimmed during installation, leaving exposed edges vulnerable to rust. Winter moisture accelerates the process. 

Addressing cut edge corrosion early prevents serious structural deterioration. Treatments such as specialist coatings can seal vulnerable edges and extend the lifespan of the roof, protecting your investment.

Repair minor roof damage before it becomes major

Small defects tend to worsen when exposed to winter weather. These may include: 

• Cracked or worn coatings 

• Loose fixings on metal or tiled roofs 

• Broken or slipped tiles 

• Localised deterioration on flat roofs 

Repairing these issues before temperatures drop helps prevent leaks and reduces the risk of roof failure. A planned maintenance visit from a qualified surveyor or contractor can identify and resolve early-stage problems before they escalate.

Inspect flashing around chimneys, vents and skylights

Flashing plays a critical role in keeping water out at junctions and edges. However, flashing can loosen over time – particularly in high winds – creating entry points for water. 

Commercial properties with multiple penetrations (e.g., ventilation systems or rooftop plant) are especially vulnerable to flashing failures. Residential roofs often have older lead flashings around chimneys that may crack or pull away. 

A winter inspection should include all flashings, ensuring they are secure, sealed and in good condition.

Check and improve insulation

Effective insulation is a core part of winter roof performance. Poor insulation allows heat to escape, increasing energy costs and contributing to condensation issues. In some cases, heat loss can cause snow on the roof to melt unevenly, leading to ice dams. 

For both commercial and residential buildings, a surveyor can assess whether insulation meets modern standards and advise on upgrades. Not only does this support energy efficiency, but it also helps maintain a stable internal environment.